johnson 4hp seahorse what year?

[Jarryd]

Hi, i have a johnson 4hp. Model number is 4br76m and serial is a604308. Can someone please tell me what year this is? Also i have had it started but it wont start now? i have changed fuel and spark plugs. It turns over easy and sounds like it going to start but wont? can someone please help? Cheers

 

[Daviet]

Re: johnson 4hp seahorse what year?

Can you check the model number, can't see to cross it.
Have you checked the compression and spark? Will it fire up if you squirt fuel into the carb?

 

[hidef]

Re: johnson 4hp seahorse what year?

It is a 1976 model # should be 4R76M with the standard drive gear case.
Does it have spark? What plugs did you put in recommended is Champion J6C. Your low idle should be adjusted 1 1/2 turns out from bottom the same with the high speed. You have the plug wires on the right cylinders? They don't like being reversed.

 

[Jarryd]

Re: johnson 4hp seahorse what year?

no not yet. its definitely 4BR76M model number. It starts now but will only keep running if choke is still out? Also it seems like its getting a bit hot? Not alot of water running out of small holes? Cheers

 

[tx1961whaler]

Re: johnson 4hp seahorse what year?

"Cheers"
U.K ?
The "B" in the model number means it's made in Belgium. In 1976.

 

[Daviet]

Re: johnson 4hp seahorse what year?

Wouldn't it be great if people would list their location.

 

[Jarryd]

Re: johnson 4hp seahorse what year?

thanks for your help

 

[Rick.]

Re: johnson 4hp seahorse what year?

http://forums.iboats.com/showthread.php?t=299680
Have a look through the Top Secret File. Lots of good information on things to check and some good instruction as well. Post questions as they come to you. First thing I would recommend is to check the compression. To many sink a bunch of time and parts into a motor only to find they have internal $$$$ problems not worth fixing. I'm not suggesting your motor is pouched just being cautious. Indeed it is probably a fine motor as many 4 HP's older that your's are still running like new. Parts are very available, at least in North America they are. Best of luck. Rick.

 

[Jarryd]

Re: johnson 4hp seahorse what year?

hi, ive got to the point where its running sweet now and runs without choke out. My only concern now is i feel it heats up abit. It pumps wt air out the holes but i feel it is not pumping alot of water? Ive taken the lower unit off but cant seem to find the impellor?is there more screws taht need to be undone ? cheers

 

[Rick.]

Re: johnson 4hp seahorse what year?

http://epc.brp.com/Index.aspx?lang=E&s1=a0fb63eb-0324-4a28-bc29-c3acf0569c8c
Have a look here for your parts break down. The impeller is in a cup where the drive shaft goes into. A few more screw to loosen. Rick.