1993 20hp Johnson won't hot start... help please.

[arto13]

Hi, my first boat. when bought, it started right up. BUT, I didn't know that after it starting, it would be troublesome to hot start afterwards. the hot start fires a little but mostly there's no firing. it looks like the electric components have been replaced. put in new plugs, new gas bulb so maybe carb????????
thank you for any advice.

 

[racerone]

Did you install a new water pump impeller when you bought this fine motor?-----Post your compression test values here as well.

 

[arto13]

Did you install a new water pump impeller when you bought this fine motor?-----Post your compression test values here as well.

seller said it has new impeller. i do believe it. it im now tryng it for the 4th day. it peed yesterday at first start but then i couldnt hot start. right now it starts but is not peeing. so maybe new impeller. i had it in a garbage can of water when it peed. today i have the muffs on and no pee.

 

[Scott Danforth]

welcome aboard

Three things initially

1. Sellers lie
2. always start with knowing the compression before you buy
3. do all the maintenance the seller didnt do like waterpump, etc. before you go to use the motor see item #1

post the compression numbers. check the raw water pump.

 

[saltchuckmatt]

If you are having difficulty believing the above, buy a now fairly cheap IR gun and test head temp. Tell tail (pea stream) does not indicate motor is getting cooled.

Much to learn.

 

[arto13]

thanks for advice i know sellers liebut sometimes you can tell. it's hot starting good now!!! when i used a garbage can, it peed. ocors it might be something else.
i was choking it to start it. thats what seller did. well, i learned i shouldn't. anyway, it hot started 6 times with no problems. i think the tight bulb helped too.
next step is go to water and see what happens
many thanks!!!

 

[saltchuckmatt]

Yes, choking while hot is a no-no. Hopefully your in the clear.

At least take your hand and touch the block near the head on top of the motor (be extremely carefully of moving parts) . It should be very warm but not scorching. Do it carefully. Taking it across the lake at full throttle with no overheat alarm might not give you the results you want.

Just sayin....