J Marine LLC

J Marine LLC Here to help with all your Jet Ski or Boating needs. Weather it be diagnosis, full motor rebuilds to electrical and rigging!

Location 2.5 miles down HWY J off HWY 135 11 miles outside Lauire MO.

One of jobs going on before the holiday weekend. Mercury 150 hp end cap replacement.
05/20/2026

One of jobs going on before the holiday weekend. Mercury 150 hp end cap replacement.

Stuck splines in the end of the crankshaft, took this job a lot long to remove the lower unit to do a water pump service...
05/08/2026

Stuck splines in the end of the crankshaft, took this job a lot long to remove the lower unit to do a water pump service.

Nice day to be out on service calls!
05/08/2026

Nice day to be out on service calls!

Seadoo GTI, the spark plug pipe seals are leaking bad on this one.
04/22/2026

Seadoo GTI, the spark plug pipe seals are leaking bad on this one.

This one has some bad fuel and a bad primer ball. Now it’s ready to get back out on the water.
04/01/2026

This one has some bad fuel and a bad primer ball. Now it’s ready to get back out on the water.

Transom repair on a chaparral 287.
03/31/2026

Transom repair on a chaparral 287.

2008 SeaDoo RXP steering assist fin and support replacement
03/28/2026

2008 SeaDoo RXP steering assist fin and support replacement

2019 Mercury 115 Hp ProXS Camshaft cover and seal leak, also found the shift shaft seal leaking as well.
03/28/2026

2019 Mercury 115 Hp ProXS Camshaft cover and seal leak, also found the shift shaft seal leaking as well.

Finally got the last of the bolts in and on. Now it’s fully assembled and ready to install. On the midsection and get br...
03/28/2026

Finally got the last of the bolts in and on. Now it’s fully assembled and ready to install. On the midsection and get broke in.

Had a one throw me for a loop the other day. Customer brought me there boat and said someone sprayed carb cleaner around...
03/18/2026

Had a one throw me for a loop the other day. Customer brought me there boat and said someone sprayed carb cleaner around the crankcase and it sucking it in. It still runs before dropping off at the shop. Before I tore down the motor I could never get it to run, but the compression test is good.

Had a short issue in the control box and fixed it. Tore down the motor replaced gasket and after all back together I was setting the time with the flywheel mark and the distributor mark. The number one is at top dead center the flywheel marking are near the rear port side cylinder head when it should be front port side and pointing at the distributor. I took the flywheel back off to make sure the keyway was there and it did move on me. All good there. I looked at the top of the flywheel center bolt on hub and noticed one bolt was different than the others. I took the bolts out and rotated flywheel outer to match up with the top dead center indicator. Tightened up the bolts and it started right up.

Address

30110 Proctor Road
Gravois Mills, MO
65037

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm
Saturday 9am - 12pm

Telephone

+15733726818

Website

Alerts

Be the first to know and let us send you an email when J Marine LLC posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Shortcuts

Share

Category