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@@CeltDoesStuff Only when the pullstarter is off. Thanks for watching!

@GearHeadJP I guess they did the same thing as Evinrude/Johnson with their 3, 5.5, and 6hp models. If it works, don't mess with it. The only thing I strongly dislike on these Yamaha's is the way the impeller is serviced. You need to open up the gearcase and spill oil everywhere in order to get to the impeller. It's a horrible design. Thanks for watching!

@@MrKingH8sUA-cam 😂

@kody5779 It does make a difference, but if your boat isn't too big, 4hp will do the job. It will al depend on your usage and boat.

@@VintageOutboardMan would it be possible to fit 5hp powerhead onto the 4hp leg? Same bolt patterns?

@kody5779 I believe so, yes, but I'm not 100% sure.

@kody5779 Hi there. Not that I know, unfortunately. The 5hp gets its power advantage mainly from its bigger engine displacement. You could of course experiment with different propeller pitches and see what works best. Thanks for watching.

So the 5 HP does have bigger cylinders or something does it? I know with the smaller 2.5 mercury you can put out restrictor after the carb to easily make it essentially 3.3 HP I thought that was possibly the case with these 4 and 5 HP engines you have

I must have missed where you said they were different engine displacements, my bad

You could try getting a bigger jet for the carburetor and testing top speeds before and after

This is just the normal sound of a 1 cylinder 2 stroke Yamaha. Of course, you can also hear it shaking a bit in the barrel.

@@VintageOutboardMan thank you. Mine goes away with the tiking noise after warm up…I’ll check later with more hours on it. 🙏

Hi, is the S part of the number before it, or is the S located separately in the right lower corner of the model tag? It should be a small stamped letter, not a painted one. And is your motor a blue or a grey one?

The S is in the bottom right hand corner of the model tag. The engine cover is grey, but may have faded in the Lake District sun. The upper/lower casings and transom clamp are medium grey colour. @@VintageOutboardMan

@bryanfitzgerald8046 Okay, yours is a 2001 model. I can only think of two things regarding the high idle speed. Either your throttle cable is way too tight, and the throttle won't rest on the idle stop screw (or the idle speed screw is screwed in way too far), or the idle mixture screw is set way too lean. Check the throttle adjustment first. If that checks out, start the motor and try to turn the mixture screw counterclockwise to richen the mixture and see if this lowers the rpm

It is probably printed on the spark plug leed if you check, my yamaha 4hp outboard is 1983 and it says it on the spark plug leed

Thanks. I tried/checked your suggestions, but no difference. Ended up by a new Recmar carb for £105. About same price as a genuine Yamaha carb service kit! Running sweetly now 😊

About 12kg

@@VintageOutboardMan is this good for 2 mt inflatable boat. What is maximum speed?

@arifdmn1550 I couldn't tell you what speed you'd get, but for a small boat a 2hp is fine

@@VintageOutboardMan thank you👍

Hi, I haven't driven the Bolens in a very long time and I haven't been working on it for years. I might have a manual somewhere, I will check it for you

Unfortunately it's not for sale. It hasn't run in 10 years though. I should bring it back to life. But so many other motors are still waiting for me to fix them haha

Typically the 4 hp have slightly higher compression than the 5 hp models. Most of the times they have 160-165 psi (the 5 hp should have around 135-140 psi).

Typically the 4 hp have slightly higher compression than the 5 hp models. Most of the times they have 160-165 psi (the 5 hp should have around 135-140 psi).

What do you mean with setting up the pulser coil? If you mean the ignition system, you can't do any adjustments on that other than adjusting the spark plug gap

​@@VintageOutboardMan I mean the distance between the pulser coil and the magnet, the magnet has 2 or 3 small blocks on it that pass by the pulser coil, I'm wondering if they are allowed to touch the pulser coil or there must be a certain distance between

​​@@ajlin9832 Unfortunately, I do not know those specs of that particular motor. However, lots of motors use a 0.2 mm gap.

​@@VintageOutboardMan thank you!

You mean the capacity of the gearbox? That takes 9 fl oz or 266 ml of 80w90 or 90w marine gear oil. If you mean the oil mix ratio, this is a 50:1 mix motor. The older 5.5hp are 16:1-24:1 depending of the build year.

Hey, unfortunately I do not know where to get one. I was looking into it as well, but only found a couple on Marktplaats. You could indeed try directly at Suzuki. I believe the Yamaha 2hp condenser isn't available anymore either. However, I think that one might fit the Suzuki too. Is yours broken or do you just want to change it just to be sure?

@@VintageOutboardMan i just want to change it to be sure. I think if the condenser is faulty i might damage the new breaker points. I sent an email to suzuki. Hoping they provide something. I might aswell go check my local electronics shop. Maybe they can do some measurements and get me closer. If i know more iĺl let you know.

@NZAUDIO Yes let me know when you find something. I'm curious to know as well!

Yes sir it is :)

Yes man, these are the best. They certainly don't make them like they used to! Thanks for watching

Can't wait to put it on the boat next season! Thanks for watching!

@@VintageOutboardMan you should make a video of it when you do!!

@@mattsboatyard6891 I will certainly do that!

Where are you located? The date code means different years for different continents.

@@VintageOutboardMan I'm from Ireland but the guy I bought it from was from the UK

@@GameCastCubed If it's a blue one, it's from 1981, if it's grey it's from 2002.

@@VintageOutboardMan 1981 so I bought it for 150 euro running such a nice little engine. I also bought a 8hp for 300 which wasn't pumping I just took the lower unit off and connected a garden hose to clear the blockage and put a new thermostat in it and away she went.

Yes these are very nice and dependable motors. The American motors run nicer imho, but Yamaha can surely build engines!

It had a dead coil/ignition module. A new one fixed the problem.

Hey, those are very nice motors! From where are you? And do you have photos from the motor?

@@VintageOutboardMan i am from Slovenia (EU). I have photos. I actually have 3 or 4 vintage outboard motors that would maybe interest you. They are legacy of my girlfriends grandpa. Can i get your email?

@@andrejkocjancic8663 I would love to see the pictures!

@@VintageOutboardMan i sent you an email. Check spam if it isnt in inbox. You can delete the post with your email now ;)

Hi, it could have multiple causes. Does the motor increase rpm's when you pump the primer bulb in the fuel line while running at full throttle?

Hey, the correct spark plug for this motor is the BR5HS, not the B4HS. However, sometimes manufacturers reccomended different spark plug for different countries or climates. Mine has a sticker on it that states the BR5HS should be used. This plug is readily available. You want to set the plug gap at 0.6mm or .023''. The mix ratio is 50:1 for models prior to 1987 and 100:1 for 1987 and later models. The early models had a white cowl, then they switched to a silver one (like mine) and after that they switched to a black cowl. Those also had electronic ignition and an adjustable idle screw I believe. I will make a comparison video of the DT2 and a Yamaha 2A in the near future. The Yamaha is a way nicer motor, however the impeller is not nearly as easy to change as on the Suzuki. I like them both and they are both very reliable motors. Thanks for watching!

@@VintageOutboardMan Thank you very much. I ordered the parts today and checked the plug gap. It had a great running sound. Sadly itś slowingdown after a while and shuts off. But some cooling time helps. Probably the cooling isn´t sufficient anymore, and needs more oil to get better. Will check the cooling system.

@@ReasonanceHead I would definitely check out the water pump impeller. It could also be an ignition problem, but those systems are usually pretty reliable.

@@VintageOutboardMan you were right, the impeller was broken. Decides to take apart everything an clean it up, so cooling is optimal. Do you know where the vent is for the gear oil? On some models its straight above, but mine doesnt seem to have one. The carberator has two rings to make it smaller and cylinder has a iron part in it to make the opening smaller. Wonder if there is more hp there? Or is it for other design reasons?

@@ReasonanceHead I'm glad you solved the problem. Hopefully it didn't suffer any damage from overheating. You're right about the gearcase. The earlier models only had 1 screw (mine as well). Later models had 2 screws, like most outboards. You just drain the oil by taking out that screw and you fill it by laying it on its side and pouring in the fresh oil. It takes approximately 40cc of oil. You can't use a pump as there is no vent. Th carburetor isn't upgradable as far as I know. All models were 2hp except the latest version, that one has 2.2hp, but it has a different carburetor I believe.

You're welcome. There is a small (and sometimes hard to read) stamped letter on the ID plate. This letter will tell the exact year your motor was built. However, there is a USA and a European date code chart. These two will tell you two different years for the same letter. If you send me this letter and tell me on which continent you are, I will tell you the year your motor was built.

​@@VintageOutboardMan Thank you for the video. I have a yamaha 4hp, built in Japan, and the serial number is S 210939. I live in France. Can you give me the year of my motor ? Thanks

@@stevenhubner634 The letter should be stamped in the black part of the ID tag, NOT in the silver boxes. I think the S you mentioned is the wrong letter and stands for 'short shaft'. If you provide me the letter stamped in the bottom left or bottom right of the tag, I can tell you in which year it was built.

@UC5gLpebSEdKyDGj94Qek_pQ The S is stamped on the left on the ID Tag (before the serial number).

@@VintageOutboardMan The S is stamped on the left on the ID Tag (before the serial number).

You can't fully upgrade it to 5hp. The 5hp got a larger displacement (103cc vs 83cc) and it has a bigger carburetor. Maybe if you change the carburetor, you gain a a little power though.

@@VintageOutboardMan se

@@VintageOutboardManits got the same cc

​@@tjitsewenselaar5874 Not according to the manual and official specs ;)

@@VintageOutboardMan thats weird i have a 4 and 5 hp end did a ful rebuild they had they same piston rings and piston

You are a 100% right! I got my years mixed up for some reason. Thanks for watching!

I'm using Pennzoil TCW-3 oil

VintageOutboardMan Thanks! How about the oil in the propeller gears?

@@c45275 I'm using StarBrite, I believe it's 80W90

I already tested for spark with a spark tester and it showed no spark directly on the coil. With old outboards it's the exact same. They will run one last time with cracked coils, but when they warm up they quit and then they're dead. I think the same happened to this Dolmar. But yeah, if I'll replace the coil someday, I will give the carb a good ultrasonic clean too :)

I never got around to fix the problem, but the cable itself was just fine. I think the coil just died. They aren't cheap, but it would be worth it cause it's a fine saw.

@@VintageOutboardMan with a bad coil it wouldn't run like it did at all. You might find cheap ones on aliepress if youre stubborn to replace it. I say it's a fuel problem, so nasty carb, tubes or filters

@@broekspijp41 After all, the coil did turn out to be the problem. It happens a lot actually. When a coil goes bad, it will often run one last time and when it warms up it dies. This is the case with almost every vintage outboard, which I work on a lot. I got a replacement coil and that fixed the problem.

Nope, compression is just fine, they're not high compression saws anyway. The coil turned out to be bad. Replacement coil fixed the problem.

Hi Tom, Been a very long time since we spoke, couple of years at least! I was such a loyal viewer of your channel, but I got so busy and well, you know how life is. How are you? Still having fun at the field at your house? Hope things are going well for you :) Greetings from the Netherlands!

@@VintageOutboardMan Yeah, you were always posting nice and interesting comments. :) But life gets busy, I totally understand. Its fun sometimes looking back at my older videos, and seeing the comments from people I haven't heard from in years. Kinda a cool time capsule. Yep, we're still having a good time over here. Not as often as before, we're starting to get old. :) But nice hearing from you again man. Hope things are well for you too! Greetings from Pennsylvania. :)